Three beakers labelled as A, B and C each containing 25 ml of water were taken. A small amount of NaOH, an hydrous CuSO4 ,

Three beakers labelled as A, B and C each containing 25 ml of water were taken. A small amount of NaOH, an hydrous CuSO₄ , and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in temperature of solution, contained in beakers A and B, where as in beaker C, the temperature of the 

solutions falls. Which one of the following statements is / are correct ? 

1) In beakers ‘A’ and ‘B’, exothermic process has occurred 

2) In beakers ‘A’ and ‘B’, endothermic process has occurred 

3) In beaker ‘C’, exothermic process has occurred 

4) In beaker ‘C’, endothermic process has occurred 

A) 2 

B) 2, 3 

C) 1, 4 

D) 1